Manufacture of filaments, films, and other cellulose products from cellulose solutions.



RUDOLF HijMBERG, OF GHARLOTTENBURG, GERMANY.

MANUFACTURE OF FILAMENTS, FILMS, AND OTHER CELLULOSE PRODUCTS FROM GELLULOSE SOLUTIONS.

No Drawing.

To all whom it may concern:

B e 1t known that I, RUDOLF-HtSMBERG, a sub ect of the German Emperor, residing at Charlottenburg, near Berlin, Germany, have lnvented certaln new and useful Improve-- ments in the Manufacture of Filaments, Films, and other Cellulose Products from Cellulose Solutions, of which the following is a specification.

It is well-known, that artificial filaments, films and other cellulose products are produced from cuprammonia solutions of cellulose. I have discovered, that the filaments and other products thus obtained are considerably more valuable, if an aldehyde orfilms or layers, while the same solutions 'Specification of Letters Patent.

Patented Jan. 31, 1911.

Application filed August 20, 1910. Serial No. 578,225.

without the addition of formaldehyde form milky opaque films.

The new products differ from those produced in exactly the same manner from solutions free from aldehyde by a softer touch, greater clearness and, greater strength. Moreover, their resistance to water is increased, although to a less degree.

' hat I claim is l. The rocess for the manufacture of filaments, lms and other cellulose products from cuprammonia-solutions of cellulose, which consists in adding to the said solutions an aldehyde and then treating them further in the usual manner.

2. The process for the manufacture of filaments, films and other cellulose products from cuprammonia solutions of cellulose, which consists in adding formaldehyde to the said solutions and then treating them further in the usual manner.

In testimony whereof-I affix my signature in presence of two Witnesses.

' RUDOLF HOMBERG. Witnesses:

HENRY HAsrEk, ARTHUR ScHRoEnER, 

